sleepovers and sleeping arrangements

HiI am thinking of having a couple of my ds's mates over for a couple of sleepovers during the holidays.However what do I do about sleeping arrangements, I only have the one bed for my ds is it okay for my ds and his mate to sleep in a single bed together one at either end.This will be the first time I have done this so just wondering what others do.I don,t have a ready bed or anything like that and don,t really want to have to buy anything.Any ideas.